PRODUCTION COSTS.
It’s assumed that the equivalent solar wouldn’t be installed somewhere else, so you would need to produce more total to meet demand, meaning increased production costs with an upwards cost growth curve based on scale unless the materials, usually aluminum and slabs of silicon fresh out the oven or sometimes cadmium telluride, are already overabundant.
Krik@lemmy.dbzer0.com 2 months ago
8-10 years is a fully fledged pv system. The small balcony panels pay themselves after about 5 years, longer if you add a battery.